Microstructure of the diffusion layer obtained in Ti6Al2Cr2Mo alloy during glow discharge nitriding

• Autorzy: Jeleńkowski J. , Major B. , Gołębiewski M. , Wierzchoń T.
• Języki publikacji: EN

Abstrakty

EN

This paper presents the results of metallographic, X-ray, and TEM examinations of the microstructure and the sub-structure of the diffusion layer that underlies the TiN + Ti2N layer produced by glow discharge nitriding of the Ti6Al2Cr2Mo alloy. The metallographic examinations show that a two-phase zone α + β - its thick-ness increasing with the increasing process temperature - can be observed underneath the nitride layer after half an hour of nitriding at 940ºC, when the core of the sample has an α - phase structure. The presence of the glow discharge assisting the nitrid-ing process accelerated the thickening of both the nitride zone and the diffusion layer. Morphology of α - phase grains changed as well. The grain lengh-to-thickness ratio decreased. X-ray examinations revealed the presence in the substrate structure of two kinds of solid solution with the α titanium matrix. TEM analysis showed a state of certain ordering of the crystalline lattice and, locally, a tweed-type structure of the β phase.

Słowa kluczowe

EN

two-phase titanium alloy; glow discharge nitriding; TEM microstructure; phase composition

• Wydawca: Politechnika Gdańska
• Czasopismo: Advances in Materials Science
• Rocznik: 2003
• Tom: Vol. 3, nr 2(4)
• Strony: 28--34
• Opis fizyczny: Bibliogr. 15 poz., rys., tab.

Twórcy

autor

Jeleńkowski J.

• Warsaw University of Technology, Faculty of Materials Science and Engineering, Warsaw, Poland

autor

Major B.

• Institute of Metallurgy and Materials Science, Polish Academy of Scinces, Cracow, Poland

autor

Gołębiewski M.

• Warsaw University of Technology, Faculty of Materials Science and Engineering, Warsaw, Poland

autor

Wierzchoń T.

• Warsaw University of Technology, Faculty of Materials Science and Engineering, Warsaw, Poland

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